Dr. Bi-Zhen Dong Profile

Dr. Bi-Zhen Dong

at Institute of Physics

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Publications (9)

Proceedings Article | 13 June 2005 Paper

The focusing action of refractive microlens by rigorous method

Juan Liu, Ben-Yuan Gu, Bi-Zhen Dong, Guo-Zhen Yang

Proceedings Volume 5856, (2005) https://doi.org/10.1117/12.612490

KEYWORDS: Microlens, Diffraction, Light scattering, Optical components, Maxwell's equations, Refractive index, Polarization, Solids, Electromagnetic theory, Computer simulations

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Proceedings Article | 14 November 2002 Paper

Analysis of focal performances of cylindrical microlenses made of anisotropically dielectric material based on rigorous diffraction theory

Bi-Zhen Dong, Jia-Sheng Ye, Ben-Yuan Gu

Proceedings Volume 4935, (2002) https://doi.org/10.1117/12.469070

KEYWORDS: Microlens, Dielectrics, Dielectric polarization, Diffraction, Crystals, Numerical simulations, Refractive index, Lenses, Electromagnetic theory, Switching

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In this paper we investigated the focal performances of the refractive cylindrical micro-lenses made of anisotropic material(uniaxial crystal ) with the use of the rigorous diffraction theory and boundary element method (BEM). The expressions of conversion from the H-field into the E-field for the TM-polarization are given. The lateral and axial intensity distributions of the E- ( H-)field for the TM- polarization and E-field of the TE-polarization are calculated. The focusing features of the micro-lenses, including the focal spot size, the focal length, and the diffractive efficiency are appraised. The focusing characteristics of both isotropically and anisotropically refractive cylindrical micro-lenses with different f-numbers have been analyzed and compared. The numerical simulations show that in the case of isotropic dielectricity the E- and H- field distributions for the TE- and TM-polarizations exhibit almost the same focusing behavior for all different f-numbers (f/4, f/2, f/1.5). However, in the case of anisotropic dielectricity, we found that the focal spot size of the E-field for the TM-polarization is quite larger than that of the E-field for the TE- polarization, for instance, the focal spot sizes of the E-field for TM- and TE-polarizations are 2.35μm and 1.98μm in the case of f/2, respectively. It is noted that the positions of the focal plane of the E-field for the TE- and TM-polarizations are shifted remarkably away from each other. The focal length of the E-field of the TE-polarization is shorter than that of the E-field of the TM-polarization. For instance, the positions of the focal plane of the E-field for the TE- and TM-polarizations are 59.35μm and 70.79μm in the case of f/2, respectively. This result can be understood from the simple argument owing to the different refraction index for two polarizations in the uniaxial crystal. These interesting features are reported here for the first time. It is anticipated that this kind of elements may serve as the ideal light switching devices with high speed in the MEMS.

Proceedings Article | 14 November 2002 Paper

Design of closed-boundary microcylindrical lenses with long focal depth and condensed lateral section

Ben-Yuan Gu, Jia-Sheng Ye, Bi-Zhen Dong

Proceedings Volume 4935, (2002) https://doi.org/10.1117/12.469067

KEYWORDS: Modulation, Diffraction, Lenses, Numerical simulations, Beam propagation method, Microelectromechanical systems, Wave propagation, Optical discs, Free space, Diffractive optical elements

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Proceedings Article | 23 March 2000 Paper

Optimization design of aperiodic optical superlattices for harmonic generations

Ben-Yuan Gu, Yan Zhang, Bi-Zhen Dong

Proceedings Volume 3928, (2000) https://doi.org/10.1117/12.379908

KEYWORDS: Adaptive optics, Second-harmonic generation, Superlattices, Nonlinear optics, Harmonic generation, Optical design, Light wave propagation, Constructive interference, Nonlinear crystals, Crystals

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Proceedings Article | 18 June 1998 Paper

Diffractive phase elements that generate point and ring patterns in monochromatic or dual-wavelength illuminating systems

Bi-Zhen Dong, Rong Liu, Ben-Yuan Gu, Guozhen Yang

Proceedings Volume 3291, (1998) https://doi.org/10.1117/12.310582

KEYWORDS: Diffraction, Numerical simulations, Diffractive optical elements, Optical design, Modulation, Phase retrieval, Photomasks, Astronomical imaging, Optical components, CCD cameras

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Proceedings Article | 18 June 1998 Paper

Design of diffractive phase elements that implement axial intensity modulations with conjugate gradient algorithm

Rong Liu, Ben-Yuan Gu, Bi-Zhen Dong, Guozhen Yang

Proceedings Volume 3291, (1998) https://doi.org/10.1117/12.310594

KEYWORDS: Modulation, Phase shift keying, Image segmentation, Nondiffracting beams, Diffraction, Error analysis, Solids, Optical design, Optical alignment, Physics

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Proceedings Article | 18 June 1998 Paper

Design of diffractive phase elements for beam shaping in the fractional Fourier transform domain

Yan Zhang, Ben-Yuan Gu, Bi-Zhen Dong, Guozhen Yang

Proceedings Volume 3291, (1998) https://doi.org/10.1117/12.310595

KEYWORDS: Beam shaping, Fractional fourier transform, Optical components, Fourier transforms, Gaussian beams, Laser applications, Energy conversion efficiency, Collimation, Numerical simulations, Nonimpact printing

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Proceedings Article | 29 December 1992 Paper

Theory of the amplitude-phase retrieval in any linear-transform system and its applications

Guozhen Yang, Ben-Yuan Gu, Bi-Zhen Dong

Proceedings Volume 1767, (1992) https://doi.org/10.1117/12.139042

KEYWORDS: Reconstruction algorithms, Imaging systems, Inverse problems, Phase retrieval, Image restoration, Inverse optics, Diffraction, Scattering, Solid state physics, Optical components

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This paper is a summary of the theory of the amplitude-phase retrieval problem in any linear transform system and its applications based on our previous works in the past decade. We describe the general statement on the amplitude-phase retrieval problem in an imaging system and derive a set of equations governing the amplitude-phase distribution in terms of the rigorous mathematical derivation. We then show that, by using these equations and an iterative algorithm, a variety of amplitude-phase problems can be successfully handled. We carry out the systematic investigations and comprehensive numerical calculations to demonstrate the utilization of this new algorithm in various transform systems. For instance, we have achieved the phase retrieval from two intensity measurements in an imaging system with diffraction loss (non-unitary transform), both theoretically and experimentally, and the recovery of model real image from its Hartley-transform modulus only in one and two dimensional cases. We discuss the achievement of the phase retrieval problem from a single intensity only based on the sampling theorem and our algorithm. We also apply this algorithm to provide an optimal design of the phase-adjusted plate for a phase-adjustment focusing laser accelerator and a design approach of single phase-only element for implementing optical interconnect. In order to closely simulate the really measured data, we examine the reconstruction of image from its spectral modulus corrupted by a random noise in detail. The results show that the convergent solution can always be obtained and the quality of the recovered image is satisfactory. We also indicated the relationship and distinction between our algorithm and the original Gerchberg- Saxton algorithm. From these studies, we conclude that our algorithm shows great capability to deal with the comprehensive phase-retrieval problems in the imaging system and the inverse problem in solid state physics. It may open a new way to solve important inverse source problems extensively appearing in physics.

Proceedings Article | 1 August 1991 Paper

Recovery for a real image from its Hartley transform modulus only

Bi-Zhen Dong, Ben-Yuan Gu, Guozhen Yang

Proceedings Volume 1429, (1991) https://doi.org/10.1117/12.44660

KEYWORDS: Image restoration, Image resolution, Reconstruction algorithms, Image quality, Signal to noise ratio, Fourier transforms, Algorithms, Image retrieval, Holography, Interferometry

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Showing 5 of 9 publications

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